/*
* Copyright 2011 Pavel Kozhin 
*
* Licensed under the Apache License, Version 2.0 (the "License"); 
* you may not use this file except in compliance with the License. 
* You may obtain a copy of the License at 
* 
* http://www.apache.org/licenses/LICENSE-2.0
* 
* Unless required by applicable law or agreed to in writing, software 
* distributed  under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
* See the License for the specific language governing permissions and 
* limitations under the License.
*
* Author: Pavel Kozhin.
*/
package org.etherframework.controller.common
{
	import flash.errors.IllegalOperationError;
	
	import mx.core.IFlexDisplayObject;
	import mx.core.Singleton;
	import mx.managers.IPopUpManager;
	
	import org.etherframework.controller.ReactiveCommand;
	import org.etherframework.common.command.ICommand;
	
	import raix.reactive.IObservable;
	import raix.reactive.Observable;
	import raix.reactive.Unit;

	public class RemovePopUpCommand extends ReactiveCommand
	{
		private var _model:PopUpModel;
		private var _manager:IPopUpManager;
		
		public function initialize(model:PopUpModel):ICommand
		{
			if (!model)
				throw new ArgumentError("Arguemtn model:PopUpModel can not be null.");
			if (!model.popUp)
				throw new IllegalOperationError("Model "+model+" should have reference to a popUp.");
			
			_model = model;
			_manager = IPopUpManager(Singleton.getInstance("mx.managers::IPopUpManager"));
			
			markAsInitialized();
			return this;
		}
		
		override public function observable():IObservable
		{
			if (IFlexDisplayObject(_model.popUp).parent)
			{
				_manager.removePopUp(IFlexDisplayObject(_model.popUp));
			}
			
			return Observable.value(new Unit());
		}
	}
}